E21B 44/02
Automatic control of the tool feed
Official title: Automatic control of the tool feed ({E21B44/005,} E21B44/10 take precedence)
E21B44/02 (Automatic control of the tool feed) appears on 874 US grants and 959 published applications in this corpus.
Search patents in E21B- Granted patents
- 874
- Published applications
- 959
- Assignees
- 274
- Inventors
- 1,591
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 9 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 15 | 7 |
| 2002 | 6 | 5 |
| 2003 | 6 | 5 |
| 2004 | 3 | 9 |
| 2005 | 3 | 4 |
| 2006 | 9 | 3 |
| 2007 | 1 | 5 |
| 2008 | 4 | 4 |
| 2009 | 4 | 21 |
| 2010 | 10 | 25 |
| 2011 | 9 | 8 |
| 2012 | 19 | 18 |
| 2013 | 9 | 26 |
| 2014 | 21 | 38 |
| 2015 | 26 | 25 |
| 2016 | 24 | 65 |
| 2017 | 28 | 45 |
| 2018 | 36 | 69 |
| 2019 | 51 | 83 |
| 2020 | 77 | 83 |
| 2021 | 79 | 106 |
| 2022 | 79 | 84 |
| 2023 | 98 | 75 |
| 2024 | 78 | 70 |
| 2025 | 63 | 40 |
| 2026 | 36 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and system for controlling drill functionality6 Oct 2026US 12,753,689 B2Technological Resources Pty. Limited
- Calculating pull for a stuck drill string15 Sep 2026US 12,735,953 B2Landmark Graphics Corporation
- Dynamic load resistant drilling system15 Sep 2026US 12,735,974 B2Schlumberger Technology Corporation
- Systems and methods for torque and drag analysis of downhole systems15 Sep 2026US 12,735,975 B2Schlumberger Technology Corporation
- Method performed by a control device for controlling the feeding distance and feeding rate in a rock drilling unit, a rock drilling unit and a rock drilling rig8 Sep 2026US 12,729,619 B2Epiroc Rock Drills Aktiebolag
- Drilling system for lithium recovery1 Oct 2026US 2026/0298070 A1Saudi Arabian Oil Company
- Devices, systems, and methods for high frequency oscillation mitigation24 Sep 2026US 2026/0286830 A1Schlumberger Technology Corporation
- Drilling assembly systems and methods10 Sep 2026US 2026/0266137 A1
- Horizontal directional drilling system with drill string breakout monitoring10 Sep 2026US 2026/0266146 A1Vermeer Manufacturing Company
- Intelligent detection robot for downhole operating condition characteristic data in complex-structure wells10 Sep 2026US 2026/0266171 A1Southwest Petroleum University
Most cited
By later US patents
- Closed loop drilling system295US 5,842,149 ABaker Hughes Incorporated · 1998
- Coiled tubing injector with hydraulic traction slip mitigation circuit and method of use155US 10,024,123 B2National Oilwell Varco, L. P. · 2018
- Automatic control of drilling system150US 5,449,047 AIngersoll-Rand Company · 1995
- Automated MSE-based drilling apparatus and methods120US 7,938,197 B2Canrig Drilling Technology Ltd. · 2011
- System and method for surface steerable drilling115US 8,210,283 B1Hunt Energy Enterprises, L.L.C. · 2012